Slow Imac

So, did you turn on FileVault?

Encrypting or decrypting - A drive is currently encrypting or decrypting. The computer may run more slowly than normal until the process finishes.

Filevault state, open Terminal & paste these in & press enter…

    fdesetup status

    diskutil cs list | grep 'Conversion Progress'

Delete this file & restart...

/Library/LaunchAgents/com.microsoft.OneDriveStandaloneUpdater.plist

EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac. It will not display any personal info.

https://www.etrecheck.com/

Pastebin is a good place to paste the whole report if you capture the URL while there…

https://pastebin.com/

Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck. In a Reply before you click post, look for this to add longer texts...

1) Uninstall the 'cleaner' using the manufacture's instructions. Those are notorious for causing new problems.

2) Stop worrying about the cache. Usually cache makes your machine run faster.

3) Reinstall or restore to an external USB 3 SSD (assuming you have a 2012-2019 21.5" iMac with a 5400rpm HDD).

4) If an external SSD isn't an option uninstall MS office, especially One Drive. Those poor 5400rpm drives can only just keep up with MacOS. When you run 3rd party auto-updaters, authenticators, and file-syncing in the background they start to become bottlenecks.

Optional: Run Etrecheck and post the results. (Use the 'additional text' post button next to 'insert image'). There may be other issues.

👍

Etrecheck report?

So, how's it going?

OK. :)